Append(String, Int32, Int32) Append(Char[], Int32, Int32) Adds the specified sequence of characters to the end of this buffer. Append(ICharSequence, Int32, Int32) Added in 1. Append(Single) Adds the string representation of the specified float to the end of this StringBuffer. ...
CompareTo(StringBuilder) 2 つの StringBuilder インスタンスを辞書式で比較します。 Delete(Int32, Int32) および endで指定された一連の文字をstart削除します。 DeleteCharAt(Int32) 指定したインデックス位置にある文字を削除します。 は、残りの文字を左にシフトします。 Dispose() 変更可能...
[Android.Runtime.Register("insert", "(ILjava/lang/CharSequence;)Ljava/lang/StringBuilder;", "")] public Java.Lang.StringBuilder Insert (int dstOffset, Java.Lang.ICharSequence? s); Paramètres dstOffset Int32 s ICharSequence à CharSequence insérer. Retours StringBuilder Attributs Register...
lang.*; public class StringBuilderDemo { public static void main(String[] args) { StringBuilder str = new StringBuilder("tuts "); System.out.println("string = " + str); // appends the char argument as string to the StringBuilder. str.append('A'); // print the StringBuilder after ...
StringBuilder append(char[] str, int offset, int len) StringBuilder append(double d) StringBuilder append(float f) StringBuilder append(int i) StringBuilder append(long lng) StringBuilder append(Object obj) StringBuilder append(String s) Appends the argument to this string builder. The data is conv...
在java中string的常用方法 在Java里处理文本几乎天天要和String打交道，掌握它的常用方法能让你写代码更顺手。String对象一旦创建就不能修改，每次操作都会生成新对象，理解这点能避免很多坑。字符串长度用length()方法获取，比如"hello".length()得到5。注意别和数组的length属性搞混，数组后面没括号。取某个位置的...
StringBuilderappend(char[] str) Appends the string representation of the char array argument to this sequence. StringBuilderappend(char[] str, int offset, int len) Appends the string representation of a subarray of the char array argument to this sequence. StringBuilderappend(double d)...
拼接字符串要小心性能问题，加号连接在循环里会产生大量临时对象。这种情况用StringBuilder更合适，它的append方法直接在原对象上修改，避免反复创建新对象。单线程环境用StringBuilder，多线程场景换成StringBuffer更安全。转换字符数组用toCharArray方法，反过来用String构造函数传数组参数。检查是否包含特定子串用contains方法，找...
17. [Recommended] Use the append method in StringBuilder inside a loop body when concatenating multiple strings. Counter example: String str = "start"; for (int i = 0; i < 100; i++) { str = str + "hello"; } Note: According to the decompiled bytecode file, for each loop, it...
{valsb=StringBuilder()sb.append("brand=${Build.BRAND}\n")sb.append("rom=${Build.MODEL}\n")sb.append("os=${Build.VERSION.RELEASE}\n")sb.append("sdk=${Build.VERSION.SDK_INT}\n")sb.append("launch_time=${LAUNCH_TIME}\n")//启动app的时间sb.append("crash_time=${formatter.format(...